#!/usr/bin/env python 3
#_*_ coding : utf - 8 _*_

'a test module'

__author__='Luweiba'

import sys
def test():
    args = sys.argv
    if len(args) == 1:
        print('Hello ,world !')
    elif len(args) == 2:
        print('Hello,%s!'%args[1])
    else:
        print('Too many arguments!')

if __name__ =='__main__':
    test()
